From 945dbdbd3c902b94a6a2ede95b8ea2112c865d3c Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <hans@eds.org>
Date: Tue, 25 Dec 2018 23:32:14 +0100
Subject: [PATCH] prevent NPE in Bluetooth swap

                   ACRA  E  ACRA caught a IllegalStateException for org.fdroid.fdroid.debug
                         E  java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
                         E      at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:62)
                         E      at android.os.Handler.handleCallback(Handler.java:751)
                         E      at android.os.Handler.dispatchMessage(Handler.java:95)
                         E      at android.os.Looper.loop(Looper.java:154)
                         E      at android.app.ActivityThread.main(ActivityThread.java:6128)
                         E      at java.lang.reflect.Method.invoke(Native Method)
                         E      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
                         E      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
                         E  Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a
                            null object reference
                         E      at org.fdroid.fdroid.localrepo.peers.BonjourPeer.hashCode(BonjourPeer.java:41)
                         E      at sun.misc.Hashing.singleWordWangJenkinsHash(Hashing.java:48)
                         E      at java.util.HashMap.put(HashMap.java:423)
                         E      at java.util.HashSet.add(HashSet.java:217)
                         E      at rx.internal.operators.OperatorDistinct$1.onNext(OperatorDistinct.java:62)
                         E      at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:202)
                         E      at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:162)
                         E      at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
                         E      ... 7 more
---
 .../java/org/fdroid/fdroid/localrepo/peers/BonjourPeer.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/src/full/java/org/fdroid/fdroid/localrepo/peers/BonjourPeer.java b/app/src/full/java/org/fdroid/fdroid/localrepo/peers/BonjourPeer.java
index ae09329d6..0552ebf67 100644
--- a/app/src/full/java/org/fdroid/fdroid/localrepo/peers/BonjourPeer.java
+++ b/app/src/full/java/org/fdroid/fdroid/localrepo/peers/BonjourPeer.java
@@ -38,7 +38,11 @@ public class BonjourPeer extends WifiPeer {
 
     @Override
     public int hashCode() {
-        return getFingerprint().hashCode();
+        String fingerprint = getFingerprint();
+        if (fingerprint == null) {
+            return 0;
+        }
+        return fingerprint.hashCode();
     }
 
     @Override